Tucson, AZ: University of Arizona.
Soft cover. Very Good. Arizona Bureau of Mines, Mineral Technology Series Number 38. Bulletin Number 142. University of Arizona Bulletin,Volume VIII, No. 2. April 1, 1937. 148 pages, in original printed wrappers. Index, illustrations, folding chart. Coffee ring on front cover, otherwise very good with light general reading wear. Provide a detailed history of placer mining at many different locations throughout the state.